By working together we iterated to improve the results by: (1) insuring that all codes were using the same data, (2) improving the models used by the codes, and (3) correcting errors in the codes; no code is perfect. Even after a number of iterations we still found differences, ...
If the protons and neutrons are not equal, does that mean it is a radioactive isotope? How did the discovery of the neutron lead to nuclear physics? How do you calculate the half-life of a radioactive isotope? A beta particle is a high speed electron from the nucleus. This ...
Thus, the number of protons in an atom identifies it as an atom of a particular element. The number of protons in an atom is referred to as the atomic number. 因此,原子中的质子数决定了原子的种类。原子中的质子数等于其原子序数(元素序数)。 The information provided by the periodic table for...
How to calculate the relative atomic mass of an element? How can you calculate the number of neutrons (n) in an atom? How to find the amu of an isotope? How to find atomic weight on the periodic table How to find isotopic mass ...
Many stellar black holes have objects around them, and by looking at the behavior of the objects you can detect the presence of a black hole. You then use measurements of the movement of objects around a suspected black hole to calculate the black hole's mass. What you look for is a st...
involve neutrinos to predict the heavy elements produced from the explosions of stars and star mergers. Angular moments encapsulate the total number and flux of the neutrinos into a small set of equations of motion. Scientists can then use these equations to calculate the change in neutrino flavor...
Edward Farhi, an MIT physicist who researched strangelets, thinks the most likely place to find strange matter is in neutron stars. These collapsing stars compress their interiors forcefully. "At the core, you have densities and pressures large enough to form strange matter. If strange matter for...
Knowing the relative fraction of each isotope of a particular element that occurs in nature allows you to calculate the atomic mass of that element, which, because it is an average, is not the mass of any one atom but a number that is between the heaviest and lightest isotopes pres...
Neutron bombs Half-life Radon gas Ionization smoke detectors Carbon-14 dating All of these terms are related by the fact that they all have something to do with nuclear elements, either natural or man-made. Let's start at the beginning and understand where the word "nuclear...
Calculate the atomic mass of an element with an atomic number of 18 and a neutron number of 20. Solution: The number of protons = 18. The number of neutrons = 20. Atomic mass is the mass of an atom= Number of protons + Number of neutrons A= 18 + 20 Therefore, the atomic mass of...